Process Technology LUFRAN Instruction page 70

Maintenance Procedures (Continued):
Procedure M1-1 (Continued):
6) Gently push downward on the back of the sensor. The slightest deflection from
horizontal should cause the sensor to alarm. The red LED on the sensor will turn off
to signify an alarm condition.
When the red LED illuminates, the unit will enter alarm mode. The red light on the
top of the unit will illuminate and the ALARMS MENU on the touchscreen display will
appear. The L Level 1 or L Level 2 alarm will flash on the display.
7) Press the FAULT RESET button on the command panel of the touch screen display
to clear the fault condition.
8) If the red LED fails to illuminate and the unit fails to enter alarm mode, then the level
sensor must be re-calibrated.
Procedure M1-2: Liquid Level Sensor Calibration Procedure:
1) Insure the liquid level sensor is properly positioned in facing the outlet tube of the
heating column. The sensor should be about 3.5mm (0.125-inch) away from the
outlet manifold.
2) Using a small flat blade screwdriver, turn the sensor adjustment potentiometer on
the back of the sensor clockwise until the red LED on the sensor illuminates.
3) Once the red LED illuminates, turn the adjustment potentiometer an additional ¼
turn clockwise.
4) Repeat the inspection procedure above. If the sensor again fails to trip and/or reset
from alarm mode, repeat the calibration procedure or replace the liquid level sensor.
M-43-01
Revision - Date: 08 – 04/06/15
Do not move the liquid level sensor position in
the mounting bracket, or the sensor will lose its
calibration. If the liquid level sensor has
shifted in the mounting bracket, then the
sensor MUST be re-calibrated.
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Lufran Single Outlet Manual